Rotary steam-engine



(Model.) 4 Sheets-Sheet 1.

P LARSSON ROTARY STEAM ENGINE.

Patented Nov. 7, 1882.

jglTITNESSES:

model.) 4 Sheets-Sheet 2. P. LARSSON.

ROTARY STEAM ENGINE. I I 110.267.230. 9e Patented NOV. 7, 1882.

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(ModeL) 4 Sheets-Sheet a,

P. LARSSON.

ROTARY STEAM ENGINE.

Patented Nov; 7, 882k WITNESSES: K VENTEV Wild W4 Z7 fi N. PETERS, mow-Lim n w. Wnhmgion o t (Model.) 1 P. LARSSON.

. ROTARY STEAM ENGINE.

No. 267,230. I Patented Nov. 7, 1882.

4 Sheets-Sheet 4.

N. PETERS. Pholo-Lilhugraphlr. Washlngicn. D. Q

UNITED STATES PATENT OFFICE.-

PEHR LARSSON, OF WESTBY, IVISGONSIN.

ROTARY STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 267,230, dated November 7,1882,

Application filed June 17, 1882. (Model.)

To all whom it may concern:

Be it known that I, PEHR LARSSON, of VVestby, in the county of Vernon and State of Wisconsin,have invented certain new and useful Improvements in Rotary Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 is a perspective view of my im' proved rotary engine. Fig. 2 is a horizontal section through the main valve for setting the engine in motion, stopping or reversing it. Fig. 3 is a vertical section through the cylinder valve-chests and valves, on line as 00, Fig. 9. Fig. 4 is a horizontal section through the same on line 2 a, Fig. 3. Fig. 5 is a perspective view of the interior of the steam-cylinder, the faceplate having been removed. Figs. 6 and 7 are detail views of the circular piston. Fig. 8 is a diametrical section through the steam-cylinder with its slides and slide-boxes. Fig. 9 is a plan or top view of the complete engine. Fig. 10 is a vertical section through the slide which operates the valves, on line 3 y, Fig. 3, with its cam and disk; and Fig. 11 is a face view of the inside of the steam-cylinder, showing the steam-ports.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to rotary steamengines of that class'in which a single piston rotates within an annular chamberin the steamcylinder; and it consists in the improvements hereinafter more fully described, and particularly pointed out in the claims.

In the accompanying drawings, A represents the cylinder,which has an annular steamchamber, a.

B is the axle or drive-shaft, upon which, inside of the cylinder, is fastened the hub or disk b, from one side of which projects an-arm, c,

holding the self-packing piston G. The con struction of the latter will be readily understood by reference to Figs. 6 and 7, from which it will be seen that it is composed of three (or more) circular disks, 1, 2, and 3, the middle one of which is made in two parts or halves, between which a spring, 4, is placed, which operates to force the two parts of the disk out against the sides of the annular steam-chamber 61 thus forming a steam-tight packing or self-packing piston. Chamber (1, has two slots or narrow openings, cl and d, arranged diametricall y opposite to each other, in which work the slides or cut-oifs shown at D and D.

E and E are the slide-boxes, which are aflixed to the back part of cylinder A, and have stuffing-boxes e 6, through which the slide-rods or cut-off rods F and F work, their outer ends being guided by boxes 9 in the upper ends of stanchions G, secured upon bracerods H, one on each side of the central driveshaft. A reciprocating motion isimparted alternately to the cut-off rods F and F by a cam, I, which is keyed upon shaft B, and engages with friction-rollers and f upon the rods, as will appear more clearly by reference to Fig. 9 of the drawings.

Steam is fed to the engine from a suitably-' L L, leads from port it to the cylinder valvechests N N, and another bifurcated pipe (shown at M M) leads from port a to chests N and N. Pipes L L and M M are so arranged that their respective branches L and M feed into the steam'chest N, one above the other, while branch-es L and M feed in like manner into the opposite steam-chest, N. WVithin chests N and N are placed the rotary reciprocating valves 0 and O, the ports 0 p and 0 1) of which are so arranged relative to the steam or induction pipes and the steam-ports q q and r r in the steam-cylinder that when live steam is fed through the branched pipe L L it will enter thesteam-chests N and N through their ports 8 and s, and through the valve-ports 0 and 0 and cylinder-ports q q the steam will enter the cylinder on diagonally-opposite sides of the cut-offs D and I). When in'this position of the valves and cut-ofi's the exhaust passes through portsr r, valve-ports pp, and chest-ports leading into the forked pipe M M, and through it into the cylindrical valve-ch amber J, (by way of its port n,) and out through the valve-channel m and its corresponding exhaust-port, m

To reverse the motion of the engine, valve K is turned so that live steam will enter through branch Z of its channel and the port at into the branched pipe M M,and through it and steamchests N and N, and through the valve-ports p and 12 into the cylinder through its ports 1' and r. The exhaust now passes through ports q q, 0 0, and s s, by way of branch pipeL L, into valvechamber J, from which it escapes through channelmand its appropriate portm To stop the engine, the handle of valve K is turned in a line with the drive-shaft B, (pointing from the cylinder,) when steam is shutoff from the valve-chamber J, as shown in Fig. 2. The rotary reciprocating valves 0 and O are operated by a slide, P, which is worked by a cam, P, forming part of it, and a disk, Q, having rollers u n, which engage with the cam. Disk Q, is keyed upon the inner end of shaft B, which projects out through a T-shaped slot in the face-plate of cam P. The slideis held in place upon the steam-chests N and N by fiat disks or buttons R It, and is slotted or recessed at its ends to engage with the arms to of the rotary reciprocating valves 0 and O.

S is the drive-wheel, which is fastened upon the outer end of the drive-shaft B.

with the bifurcated steam-channel Z Z and channels or recesses m m, substantially as and for the purpose herein shownand set forth.

2. The combination of the bifurcated steampipes L L and M M, steam-chests NN, having ports 8 s and t t, rotary reciprocating valves 0 0, having ports 0p and 0'11, cylinder A, having ports qq and rr, and provided with the piston G, cut-offs D and D, and means for operating the valves 0 O and out offs D D, all combined and arranged to operate substantially in the manner and for the purpose herein shown and described.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

PEHR LARSSON.

Witnesses:

P. J. LAYNE, OLE J oHNsoN. 

